ML19339A599: Difference between revisions
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(74 | (74 LICENSEE EVENT REPORT LER 80-32/lT CONTROL 8 LOCK: l l l l l l (PLEAss PRINT OR TYPE ALL REQUIREO INPORMATION) fiTil 8I 9v i TLICENSEE 7 | ||
LICENSEE EVENT REPORT LER 80-32/lT CONTROL 8 LOCK: l l l l l l (PLEAss PRINT OR TYPE ALL REQUIREO INPORMATION) fiTil 8I 9v i TLICENSEE 7 | |||
l v I rCODE i S i l l@l 0101 - 1010101010 14 15 LICENSE NuMSER l- 1010 @l411 21' 26 I t 11 I t I@l57 CAT LICENSE TYPE JO i | l v I rCODE i S i l l@l 0101 - 1010101010 14 15 LICENSE NuMSER l- 1010 @l411 21' 26 I t 11 I t I@l57 CAT LICENSE TYPE JO i | ||
SS I@ l | SS I@ l | ||
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7 8 09 75 REPORT CATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10 l 2 l l During performance of Core Spray Sparger Visual Inspections in accordance with NRC l | 7 8 09 75 REPORT CATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10 l 2 l l During performance of Core Spray Sparger Visual Inspections in accordance with NRC l | ||
[5Tr1 l IE Bulletin 80-13, a semi-circular linear indication was observed on the end cap of f I O I 4 I I the junction box on the "C" Core Spray Sparger. Further investigations reveal that l ITTT1 I this indication is a crack. See the attached description for additional details. I F5Te 1 1 1 10171 l I I o Ia I I I | [5Tr1 l IE Bulletin 80-13, a semi-circular linear indication was observed on the end cap of f I O I 4 I I the junction box on the "C" Core Spray Sparger. Further investigations reveal that l ITTT1 I this indication is a crack. See the attached description for additional details. I F5Te 1 1 1 10171 l I I o Ia I I I | ||
*NE" CCo' Su$$E COMPONENT CCDE Su8 ODE $ | *NE" CCo' Su$$E COMPONENT CCDE Su8 ODE $ | ||
lOl9l l S l F l@ lX l@ W@ l Pl Il Pl El Xl XI@ W@ W @ | lOl9l l S l F l@ lX l@ W@ l Pl Il Pl El Xl XI@ W@ W @ | ||
| Line 35: | Line 32: | ||
. SEcuENTIAL OCCURRENCE REPORT REVISION ggq,no EVENT YEAR REPORT NO. COOE TYPE N O. | . SEcuENTIAL OCCURRENCE REPORT REVISION ggq,no EVENT YEAR REPORT NO. COOE TYPE N O. | ||
@ 4eg l2181 of l--] | @ 4eg l2181 of l--] | ||
22 23 l 01 31 21 24 26 y 10l1l lT l 8 l01 27 28 29 30 31 32 | 22 23 l 01 31 21 24 26 y 10l1l lT l 8 l01 27 28 29 30 31 32 N AC C 0 P NT ME MouRS SB i POR B. Su L MANuPA RER lX l@lX l@ l zi@ l36zl@ 10 1010101 [Y_j @ LI_l@ l43Ni@ IR 13 18 1047l@ : | ||
N AC C 0 P NT ME MouRS SB i POR B. Su L MANuPA RER lX l@lX l@ l zi@ l36zl@ 10 1010101 [Y_j @ LI_l@ l43Ni@ IR 13 18 1047l@ : | |||
33 34 25 37 40 el 42 44 CAUSE DESCRIPTION AND CCRRECTIVE ACTIONS h | 33 34 25 37 40 el 42 44 CAUSE DESCRIPTION AND CCRRECTIVE ACTIONS h | ||
;i [ o ; lThe probable failure mode is IGSCC. See the attached description for additional l I1 11 1 dI etails . I 11 1: l l 1 l i l 31 l l L1,,,L4_j l I 7 8 9 80 ST T '6 POWER OTHER STATUS bl O RY DISCOVERY DESCRIPTION I1 i s l l H l@ l 0l 0 l 0 l@l NA l l C l@l Visual Inspection per IE Bul. 80-13 l | ;i [ o ; lThe probable failure mode is IGSCC. See the attached description for additional l I1 11 1 dI etails . I 11 1: l l 1 l i l 31 l l L1,,,L4_j l I 7 8 9 80 ST T '6 POWER OTHER STATUS bl O RY DISCOVERY DESCRIPTION I1 i s l l H l@ l 0l 0 l 0 l@l NA l l C l@l Visual Inspection per IE Bul. 80-13 l ACTIVITY CC TENT RELEASED OF RELEASE AMouNTOF ACTIVITY LOCATION 07 RELEASE l1 l6l | ||
@ ' Qlgl NA l l NA l | |||
ACTIVITY CC TENT RELEASED OF RELEASE AMouNTOF ACTIVITY LOCATION 07 RELEASE l1 l6l | PeR$0NNEL ExPOSOES | ||
@ ' Qlgl NA | |||
l l NA | |||
, NUM0ER TYPE DESCRIPTION NA l* 1 l *71 | , NUM0ER TYPE DESCRIPTION NA l* 1 l *71 | ||
* l 0 l 0 l 0 l@{@l | * l 0 l 0 l 0 l@{@l l | ||
PsRSONNEL iNau' RIES NuMsER DESCRIPTION @ | |||
NA l1 7 | NA l1 7 | ||
l a8 l9l 0 l 0 l 011l@l12 l 80 LOSS OF CR DAMACE TO PACILITY Q . | l a8 l9l 0 l 0 l 011l@l12 l 80 LOSS OF CR DAMACE TO PACILITY Q . | ||
| Line 57: | Line 45: | ||
'''" "ac use o"'' | '''" "ac use o"'' | ||
2 O IS$uEf@LLTION is i 8 o n@ o 4 03py n i i i i i i i i i i i i i i :: | 2 O IS$uEf@LLTION is i 8 o n@ o 4 03py n i i i i i i i i i i i i i i :: | ||
l | l 7 8 9 10 68 69 30 3 ' | ||
7 8 9 10 68 69 30 3 ' | |||
NAME OF PREPARER | NAME OF PREPARER | ||
* Y PHCNE: (802) 257-7711 2 | * Y PHCNE: (802) 257-7711 2 | ||
VTVYS1 05000271 LER 80-32/lT EVENT DESCRIPTION AND PROBABLE CONSEQUENCES During performance of Core Spray Sparger Visual Inspections in accordance with NRC IE Bulletin 80-13, a semi-circular linear indication was observed on the and cap of the junction box on the "C" Core Spray Sparger. Further investigation has revealed that this indication is a crack, apparently in the sensitized, heat-affected zone of a weld used to install a one-inch diameter solid plug in a visual access hole drilled in the center of the and cap. | |||
EVENT DESCRIPTION AND PROBABLE CONSEQUENCES During performance of Core Spray Sparger Visual Inspections in accordance with NRC IE Bulletin 80-13, a semi-circular linear indication was observed on the and cap of the junction box on the "C" Core Spray Sparger. Further investigation has revealed that this indication is a crack, apparently in the sensitized, heat-affected zone of a weld used to install a one-inch diameter solid plug in a visual access hole drilled in the center of the and cap. | |||
CAUSE DESCRIPTION AND CORRECTIVE ACTIONS The probable failure mode is IGSCC. .A preliminary review of documenta-tion concerning the material used to manufacture the four junction box end caps indicates that the cracked material may have been more susceptible to IGSCC than that used for the other three end caps. At this time, considera-tion is being given to application of a clamp-type cover on the affected end cap. This cover would prevent loss of the plug in the reactor vessel in the event it is dislodged outwardly during core spray operation, and would serve to restrict unplanned flow from the cracked area. Design and manufacture of this device is in progress. A meeting with the NRC in Bethesda has been scheduled for October 31, 1980, at which a full report concerning intended corrective action will be presented. | CAUSE DESCRIPTION AND CORRECTIVE ACTIONS The probable failure mode is IGSCC. .A preliminary review of documenta-tion concerning the material used to manufacture the four junction box end caps indicates that the cracked material may have been more susceptible to IGSCC than that used for the other three end caps. At this time, considera-tion is being given to application of a clamp-type cover on the affected end cap. This cover would prevent loss of the plug in the reactor vessel in the event it is dislodged outwardly during core spray operation, and would serve to restrict unplanned flow from the cracked area. Design and manufacture of this device is in progress. A meeting with the NRC in Bethesda has been scheduled for October 31, 1980, at which a full report concerning intended corrective action will be presented. | ||
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Revision as of 12:31, 31 January 2020
| ML19339A599 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee  |
| Issue date: | 10/28/1980 |
| From: | Murphy W VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML19339A597 | List: |
| References | |
| IEB-80-13, LER-80-032-01T, LER-80-32-1T, NUDOCS 8011040387 | |
| Download: ML19339A599 (2) | |
Text
. - _ _ . .
.. . . . ~ . . . . . ~ . . . - . .
(74 LICENSEE EVENT REPORT LER 80-32/lT CONTROL 8 LOCK: l l l l l l (PLEAss PRINT OR TYPE ALL REQUIREO INPORMATION) fiTil 8I 9v i TLICENSEE 7
l v I rCODE i S i l l@l 0101 - 1010101010 14 15 LICENSE NuMSER l- 1010 @l411 21' 26 I t 11 I t I@l57 CAT LICENSE TYPE JO i
SS I@ l
CON'T =
10111 $u'R] 60 l L l@l83 0 l 5 l DOCKET 0 l 0 NUMSER l 0 l 2 l 7 l es1 l@l 1 lEV0ENT l 1DATE 14 l 8 l740 l@l1 10 l 21818 l080 l@
7 8 09 75 REPORT CATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10 l 2 l l During performance of Core Spray Sparger Visual Inspections in accordance with NRC l
[5Tr1 l IE Bulletin 80-13, a semi-circular linear indication was observed on the end cap of f I O I 4 I I the junction box on the "C" Core Spray Sparger. Further investigations reveal that l ITTT1 I this indication is a crack. See the attached description for additional details. I F5Te 1 1 1 10171 l I I o Ia I I I
- NE" CCo' Su$$E COMPONENT CCDE Su8 ODE $
lOl9l l S l F l@ lX l@ W@ l Pl Il Pl El Xl XI@ W@ W @
7 8 9 to 11 12 13 18 19 20
. SEcuENTIAL OCCURRENCE REPORT REVISION ggq,no EVENT YEAR REPORT NO. COOE TYPE N O.
@ 4eg l2181 of l--]
22 23 l 01 31 21 24 26 y 10l1l lT l 8 l01 27 28 29 30 31 32 N AC C 0 P NT ME MouRS SB i POR B. Su L MANuPA RER lX l@lX l@ l zi@ l36zl@ 10 1010101 [Y_j @ LI_l@ l43Ni@ IR 13 18 1047l@ :
33 34 25 37 40 el 42 44 CAUSE DESCRIPTION AND CCRRECTIVE ACTIONS h
- i [ o ; lThe probable failure mode is IGSCC. See the attached description for additional l I1 11 1 dI etails . I 11 1
- l l 1 l i l 31 l l L1,,,L4_j l I 7 8 9 80 ST T '6 POWER OTHER STATUS bl O RY DISCOVERY DESCRIPTION I1 i s l l H l@ l 0l 0 l 0 l@l NA l l C l@l Visual Inspection per IE Bul. 80-13 l ACTIVITY CC TENT RELEASED OF RELEASE AMouNTOF ACTIVITY LOCATION 07 RELEASE l1 l6l
@ ' Qlgl NA l l NA l
PeR$0NNEL ExPOSOES
, NUM0ER TYPE DESCRIPTION NA l* 1 l *71
- l 0 l 0 l 0 l@{@l l
PsRSONNEL iNau' RIES NuMsER DESCRIPTION @
NA l1 7
l a8 l9l 0 l 0 l 011l@l12 l 80 LOSS OF CR DAMACE TO PACILITY Q .
TYPE DESCRIPTION %/ I i 9 NA l 8 9 l z l@l l 7 10 80
'" "ac use o"
2 O IS$uEf@LLTION is i 8 o n@ o 4 03py n i i i i i i i i i i i i i i ::
l 7 8 9 10 68 69 30 3 '
NAME OF PREPARER
- Y PHCNE: (802) 257-7711 2
VTVYS1 05000271 LER 80-32/lT EVENT DESCRIPTION AND PROBABLE CONSEQUENCES During performance of Core Spray Sparger Visual Inspections in accordance with NRC IE Bulletin 80-13, a semi-circular linear indication was observed on the and cap of the junction box on the "C" Core Spray Sparger. Further investigation has revealed that this indication is a crack, apparently in the sensitized, heat-affected zone of a weld used to install a one-inch diameter solid plug in a visual access hole drilled in the center of the and cap.
CAUSE DESCRIPTION AND CORRECTIVE ACTIONS The probable failure mode is IGSCC. .A preliminary review of documenta-tion concerning the material used to manufacture the four junction box end caps indicates that the cracked material may have been more susceptible to IGSCC than that used for the other three end caps. At this time, considera-tion is being given to application of a clamp-type cover on the affected end cap. This cover would prevent loss of the plug in the reactor vessel in the event it is dislodged outwardly during core spray operation, and would serve to restrict unplanned flow from the cracked area. Design and manufacture of this device is in progress. A meeting with the NRC in Bethesda has been scheduled for October 31, 1980, at which a full report concerning intended corrective action will be presented.
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